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Ms Margaret Lagorio Project 797615 <br /> September 10, 1999 <br /> Page 4 <br /> CONCLUSIONS <br /> The on-site supply well sampling shows that groundwater beneath the site is not impacted <br /> by petroleum hydrocarbons, including oxygenate compounds This suggests that <br /> although the estimated hydrocarbon mass in the vadose zone is relatively high, <br /> groundwater is not threatened <br /> Sincerely, <br /> Pinnacle <br /> Mark Capps, R G Joel Coffman <br /> Project Geologist Senior Project Supervisor <br /> Attachments Appendix A Well Log <br /> Appendix B Certified Analytical Reports and Field Sheets from Well <br /> Sampling <br /> Appendix C Revised Mass Estimate Calculations <br /> cc Paul Supple, ARCO Products Company <br /> Mark List, RWQCB-Central Valley Region <br /> CP\C 1Archive\Arw161001Reports16100p101 doe doc-481sg 1 Pinnacle <br />